Revenues (Tables)

9 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following tables disaggregate revenues by major source, timing of revenue recognition, and segment:

	Three months ended September 30, 2025						Nine months ended September 30, 2025
(in thousands)	Electric  utility		All Other		Total		Electric utility		All Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	261,780	$	—	$	261,780	$	735,308	$	—	$	735,308
Electric energy sales - commercial	251,288		—		251,288		724,796		—		724,796
Electric energy sales - large light and power	278,484		—		278,484		801,179		—		801,179
Electric energy sales - other	4,284		—		4,284		12,989		—		12,989
Other sales	—		3,158		3,158		—		11,030		11,030
Total revenues from contracts with customers	795,836		3,158		798,994		2,274,272		11,030		2,285,302
Revenues from other sources
Regulatory revenue	(17,864)		—		(17,864)		(33,522)		—		(33,522)
Other	9,456		24		9,480		27,526		1,766		29,292
Total revenues from other sources	(8,408)		24		(8,384)		(5,996)		1,766		(4,230)
Total revenues	$	787,428	$	3,182	$	790,610	$	2,268,276	$	12,796	$	2,281,072
Timing of revenue recognition
Total revenues from contracts with customers - services/goods transferred over time	$	795,836	$	3,158	$	798,994	$	2,274,272	$	11,030	$	2,285,302

	Three months ended September 30, 2024						Nine months ended September 30, 2024
(in thousands)	Electric  utility		All Other		Total		Electric utility		All Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	272,541	$	—	$	272,541	$	758,602	$	—	$	758,602
Electric energy sales - commercial	268,538		—		268,538		761,788		—		761,788
Electric energy sales - large light and power	294,421		—		294,421		846,448		—		846,448
Electric energy sales - other	4,532		—		4,532		14,087		—		14,087
Other sales	—		2,897		2,897		—		9,167		9,167
Total revenues from contracts with customers	840,032		2,897		842,929		2,380,925		9,167		2,390,092
Revenues from other sources
Regulatory revenue	(19,924)		—		(19,924)		780		—		780
Other	9,509		725		10,234		28,821		977		29,798
Total revenues from other sources	(10,415)		725		(9,690)		29,601		977		30,578
Total revenues	$	829,617	$	3,622	$	833,239	$	2,410,526	$	10,144	$	2,420,670
Timing of revenue recognition
Total revenues from contracts with customers - services/goods transferred over time	$	840,032	$	2,897	$	842,929	$	2,380,925	$	9,167	$	2,390,092